VMware vSphere Hypervisor is a free, bare-metal hypervisor from VMware that allows users to virtualize their servers and consolidate applications. Developed by VMware
License: Free
Xen is an open-source hypervisor known for its flexibility and efficiency, making it suitable for a range of systems, while VMware vSphere Hypervisor offers robust enterprise features and strong integration with VMware's ecosystem but comes at a cost. The choice between them often depends on the specific needs for customization versus comprehensive enterprise support.